The exact number of Americans in Stuttgart is unknown. An educated guess would be around 1,000 to 2,000. It is known that there are 15,316 Americans in the state of Baden-Württemberg as a whole. Many of these, however, are stationed at the U.S. military bases near Heidelberg.
Americans in Stuttgart can be reached via this here TT chat forum for Baden-Württemberg
Some more external links of possible interest:
See also: